[PATCH 27/52] intel_idle: initial IVB support

[Len Brown]

From: Len Brown <len.br...@intel.com>

>From an OS point of view, IVB looks like SNB, but quicker.

Signed-off-by: Len Brown <len.br...@intel.com>
---
 drivers/idle/intel_idle.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index d0f59c3..a759a4c 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -169,6 +169,38 @@ static struct cpuidle_state 
snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .enter = &intel_idle },
 };
 
+static struct cpuidle_state ivb_cstates[MWAIT_MAX_NUM_CSTATES] = {
+       { /* MWAIT C0 */ },
+       { /* MWAIT C1 */
+               .name = "C1-IVB",
+               .desc = "MWAIT 0x00",
+               .flags = CPUIDLE_FLAG_TIME_VALID,
+               .exit_latency = 1,
+               .target_residency = 1,
+               .enter = &intel_idle },
+       { /* MWAIT C2 */
+               .name = "C3-IVB",
+               .desc = "MWAIT 0x10",
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 59,
+               .target_residency = 156,
+               .enter = &intel_idle },
+       { /* MWAIT C3 */
+               .name = "C6-IVB",
+               .desc = "MWAIT 0x20",
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 80,
+               .target_residency = 300,
+               .enter = &intel_idle },
+       { /* MWAIT C4 */
+               .name = "C7-IVB",
+               .desc = "MWAIT 0x30",
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 87,
+               .target_residency = 300,
+               .enter = &intel_idle },
+};
+
 static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
        { /* MWAIT C0 */ },
        { /* MWAIT C1 */
@@ -347,6 +379,10 @@ static const struct idle_cpu idle_cpu_snb = {
        .state_table = snb_cstates,
 };
 
+static const struct idle_cpu idle_cpu_ivb = {
+       .state_table = ivb_cstates,
+};
+
 #define ICPU(model, cpu) \
        { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
 
@@ -362,6 +398,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
        ICPU(0x2f, idle_cpu_nehalem),
        ICPU(0x2a, idle_cpu_snb),
        ICPU(0x2d, idle_cpu_snb),
+       ICPU(0x3a, idle_cpu_ivb),
        {}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
-- 
1.7.12.rc0

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